کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1771929 1020908 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An Analysis of Light Periods of BL Lac Object S5 0716+714 with the MUSIC Algorithm
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
An Analysis of Light Periods of BL Lac Object S5 0716+714 with the MUSIC Algorithm
چکیده انگلیسی

The multiple signal classification (MUSIC) algorithm is introduced to the estimation of light periods of BL Lac objects. The principle of the MUSIC algorithm is given, together with a testing on its spectral resolution by using a simulative signal. From a lot of literature, we have collected a large number of effective observational data of the BL Lac object S5 0716+714 in the three optical wavebands V, R, and I from 1994 to 2008. The light periods of S5 0716+714 are obtained by means of the MUSIC algorithm and average periodogram algorithm, respectively. It is found that there exist two major periodic components, one is the period of (3.33±0.08) yr, another is the period of (1.24±0.01) yr. The comparison of the performances of periodicity analysis of two algorithms indicates that the MUSIC algorithm has a smaller requirement on the sample length, as well as a good spectral resolution and anti-noise ability, to improve the accuracy of periodicity analysis in the case of short sample length.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Astronomy and Astrophysics - Volume 36, Issue 3, July–September 2012, Pages 229-237